humanizeDuration humanizes time.Duration output to a meaningful value - golang's default ``time.Duration`` output is badly formatted and unreadable.

humanize-duration.go

package main

import (
        "fmt"
        "math"
        "time"
)

// humanizeDuration humanizes time.Duration output to a meaningful value,
// golang's default ``time.Duration`` output is badly formatted and unreadable.
func humanizeDuration(duration time.Duration) string {
        if duration.Seconds() < 60.0 {
                return fmt.Sprintf("%d seconds", int64(duration.Seconds()))
        }
        if duration.Minutes() < 60.0 {
                remainingSeconds := math.Mod(duration.Seconds(), 60)
                return fmt.Sprintf("%d minutes %d seconds", int64(duration.Minutes()), int64(remainingSeconds))
        }
        if duration.Hours() < 24.0 {
                remainingMinutes := math.Mod(duration.Minutes(), 60)
                remainingSeconds := math.Mod(duration.Seconds(), 60)
                return fmt.Sprintf("%d hours %d minutes %d seconds",
                        int64(duration.Hours()), int64(remainingMinutes), int64(remainingSeconds))
        }
        remainingHours := math.Mod(duration.Hours(), 24)
        remainingMinutes := math.Mod(duration.Minutes(), 60)
        remainingSeconds := math.Mod(duration.Seconds(), 60)
        return fmt.Sprintf("%d days %d hours %d minutes %d seconds",
                int64(duration.Hours()/24), int64(remainingHours),
                int64(remainingMinutes), int64(remainingSeconds))
}